.ch-nav{--nav-ice:#a8bdd6;--nav-beam:#cfe6ff;position:fixed;top:0;left:0;right:0;z-index:1200;display:flex;align-items:center;justify-content:space-between;gap:24px;padding:28px clamp(28px,5vw,76px);border-bottom:1px solid transparent;font-family:Inter,Noto Sans TC,system-ui,sans-serif;transition:background .35s ease,border-color .35s ease,padding .35s ease,-webkit-backdrop-filter .35s ease;transition:background .35s ease,backdrop-filter .35s ease,border-color .35s ease,padding .35s ease;transition:background .35s ease,backdrop-filter .35s ease,border-color .35s ease,padding .35s ease,-webkit-backdrop-filter .35s ease;animation:chNav linear both;animation-timeline:scroll();animation-range:60px 260px}@keyframes chNav{to{background:rgba(4,8,16,.82);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);border-bottom-color:rgba(168,196,230,.16);padding-top:16px;padding-bottom:16px}}@supports not (animation-timeline:scroll()){.ch-nav{animation:none;background:rgba(4,8,16,.82);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);border-bottom-color:rgba(168,196,230,.16)}}.ch-nav__logo img{height:52px;width:auto;display:block}.ch-nav ul{display:flex;gap:clamp(20px,3vw,52px);list-style:none;margin:0;padding:0}.ch-nav a{position:relative;display:block;padding:7px 0;color:var(--nav-ice);font-size:18px;letter-spacing:.15em;text-decoration:none;transition:color .2s ease}.ch-nav ul a:after{content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:var(--nav-beam);transform:scaleX(0);transform-origin:0 50%;transition:transform .3s cubic-bezier(.22,1,.36,1)}.ch-nav ul a:hover{color:#fff}.ch-nav ul a:hover:after{transform:scaleX(1)}.ch-nav ul a[aria-current=page]{color:#fff}.ch-nav ul a[aria-current=page]:after{transform:scaleX(1)}.ch-nav a:focus-visible{outline:2px solid var(--nav-beam);outline-offset:4px}.ch-nav-space{height:124px}@media (max-width:1000px){.ch-nav-space{height:88px}.ch-nav{padding:18px 22px;gap:14px}.ch-nav ul{gap:clamp(10px,1.7vw,24px)}.ch-nav a{font-size:15px;letter-spacing:.06em}.ch-nav__logo img{height:36px}}@media (prefers-reduced-motion:reduce){.ch-nav{animation:none;background:rgba(4,8,16,.82);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);border-bottom-color:rgba(168,196,230,.16)}.ch-nav,.ch-nav a,.ch-nav ul a:after{transition:none}}